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Predominantly retail with other uses
421 KNICKERBOCKER AVENUE
BROOKLYN · BIN 3074797
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1931Year Built
3Stories
K4Building Class
C4-3Zoning
5,350 sfGross Floor Area
1Units
2 Open Violations ▸FDNY Report ↗
Predominantly retail with other uses · Owner of record: 421 KNICKERBOCKER REALTY · 2,500 sf lot · 2.14 FAR built · Flood zone X
Locations of Work
Architecture
Roof1p · 1 filing · 4 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
J&J PITKIN REALTY503/22/2026
OWNER OF 421 KNICKERBOCKE103/22/2026
421 KNICKERBOCKER REALTY203/21/2026
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
LEE ENGINEERING, P.C.106/04/2024
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
LEE ENGINEERING P C203/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
KL HVAC INCGeneral Contractor303/21/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
LEE ENGINEERING, P.C.2157106/04/2024
Building Lifecycle
All (23)Filed (1)Permit Issued (1)Signed Off (1)Violation (17)Inspection (3)
03/10/2026
Violation issued (FDNY_NOV, closed)
10/27/2025
Violation issued (FDNY_NOV, closed)
10/08/2024
Signed off — Alteration
B01056753-I1
08/23/2024
Inspection — Pass-Final General Construction Non-Directive 14
Pass
View inspection ↗
07/22/2024
Inspection — Fail-Final General Construction Non-Directive 14
Fail
View inspection ↗
07/09/2024
Inspection — Fail-Final General Construction Non-Directive 14
Fail
View inspection ↗
06/07/2024
Permit issued — Mechanical Systems
B01056753-I1-MS
06/04/2024
Filed — Alteration
B01056753-I1
07/27/2009
Violation issued (FDNY_NOV, closed)
03/26/2009
Violation issued (FDNY_NOV, closed)
06/19/2008
Violation issued (FDNY_NOV, closed)
11/18/1999
Violation issued (DOB, open)
V-DOB VIOLATION - ACTIVE
11/17/1999
Violation issued (ECB, closed)
Construction
05/04/1998
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
09/16/1997
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
02/10/1997
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
08/29/1995
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
06/01/1994
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
08/16/1993
Violation issued (DOB, open)
V-DOB VIOLATION - ACTIVE
06/01/1993
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
01/12/1993
Violation issued (FDNY_NOV, closed)
06/29/1992
Violation issued (FDNY_NOV, closed)
07/08/1991
Violation issued (FDNY_NOV, closed)
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWMechanical SystemsSigned-offKL HVAC INC06/07/2024
BISMHISSUEDTEMP EAST INC01/30/2002
BISSPISSUEDDEPENDABLE SPRINKLER CORP07/24/2000
BISPLISSUEDTHEODORE WAGNER PLBG & HTG CORP07/12/2000
BISEQISSUEDSPRING SCAFFOLDING INC02/07/2000
BIS—ISSUEDPREFERRED HOUSING CORP11/19/1999
Nothing on file for this building.
▾Field Inspections (DOB CAP) — 3
DateTypeResultReport
08/23/2024Pass-Final General Construction Non-Directive 14PassView ↗
07/22/2024Fail-Final General Construction Non-Directive 14FailView ↗
07/09/2024Fail-Final General Construction Non-Directive 14FailView ↗
▾Documents — 4 on file (BIS + DOB NOW)
▸Plans & Drawings1
▸DOB NOWPlans/Sketch1
08/24/2026B01056753-I1Request digital key ↗
▸Seals & Professional Certifications1
▸DOB NOWDPL-1: Design Professional Seal & Signature1
08/24/2026B01056753-I1Open ↗
▸Environmental & Asbestos1
▸DOB NOWDEP ACP-5: Asbestos Assessment Report1
08/24/2026B01056753-I1Open ↗
▸Energy Compliance1
▸DOB NOWPreliminary Commissioning Report Certification1
08/13/2026B01056753-I1Open ↗